The No More Ransom project website has free decryption tools for many known ransomware types. Avast Decryption Tools, Trend Micro Decryptor, and ID Ransomware are other websites that can help victims of ramsomware. A list of antivirus software providers for Windows may be found here.
The United States Cybersecurity & Infrastructure Security Agency (CISA) has a site with tips on how to prevent ransomware attacks.
Google Chrome comes with Chrome Cleanup, a web browser feature that creates alerts when it detects unwanted software and allows the user to remove the software and return Chrome to its default settings.
If a decryption tool is not found, one option is to replace the hard drive and operating system and save the locked drive offline. A decryption tool for the ransomware strain may become available months later to free the data at that point.